A multi-layer hierarchical carbon mineralization curing device and method

Abstract

This invention discloses a multi-level graded carbon mineralization curing equipment and method, relating to the field of carbon dioxide mineralization curing technology. The multi-level graded carbon mineralization curing equipment includes a housing, a conveying mechanism, and an atmosphere conditioning system. The housing contains a closed reaction chamber, which is vertically divided into at least three functional areas. The conveying mechanism is located inside the reaction chamber and drives the product to be mineralized along a preset path, sequentially passing through the at least three functional areas. The atmosphere conditioning system supplies carbon dioxide gas into the reaction chamber and regulates the environmental parameters within the chamber. Based on the technical solution disclosed in this invention, precise segmented control of the carbon mineralization process is achieved from a spatial perspective, avoiding an overly uniform atmosphere environment, ensuring the efficiency and uniformity of the carbon mineralization reaction, while improving space utilization. This facilitates efficient continuous curing of large or batch products and enhances the controllability of product performance.

Description

Technical Field

[0001] This invention relates to the field of carbon dioxide mineralization curing technology, specifically to a multi-level graded carbon mineralization curing equipment and method. Background Technology

[0002] Carbon dioxide mineralization curing technology refers to a green technology path that places materials rich in calcium silicate mineral phases (such as cement, steel slag and magnesium slag in industrial solid waste) in a carbon dioxide-rich environment, so that they react chemically with carbon dioxide to generate stable carbonate minerals, thereby enabling carbon mineralized products to obtain high mechanical properties in a short time and achieve carbon dioxide sequestration.

[0003] In related technologies, existing carbon dioxide mineralization curing equipment mostly adopts a box structure, with a conveying mechanism arranged inside the box to bring the product to be mineralized into the reaction chamber via a horizontal conveyor belt or track. A carbon dioxide supply machine is set at the top or side wall of the reaction chamber to supply carbon dioxide gas into the chamber through inflation, so that the product completes the carbon mineralization reaction within a certain period of time.

[0004] However, the relevant technologies have at least the following drawbacks: First, the atmospheric environment is monotonous; the relevant technologies usually provide relatively uniform carbon dioxide concentration, humidity, and temperature conditions throughout the reaction chamber, making it impossible to adjust the environmental parameters appropriately for different stages of the carbon mineralization reaction, resulting in low overall mineralization efficiency; second, the equipment is mostly arranged in a single-layer horizontal layout, with only one conveyor line set at one height in the reaction chamber, resulting in a large footprint and insufficient space utilization, which is not conducive to the efficient and continuous curing of large or batch products; third, the products mostly maintain a single posture during the conveying process, and carbon dioxide mainly acts on one side or a few surfaces. When the product cross-section is large or the shape is complex, the problem of uneven carbon mineralization on different surfaces is likely to occur.

[0005] With the development of carbon dioxide emission reduction and sequestration technologies, the market has placed higher demands on carbon mineralization maintenance equipment, and there is an urgent need to improve existing carbon mineralization maintenance equipment and methods. Summary of the Invention

[0006] The purpose of this invention is to overcome the above-mentioned technical deficiencies and propose a multi-level graded carbon mineralization curing equipment and method to solve the technical problems of single atmosphere, low space utilization, and insufficient product performance in existing carbon dioxide mineralization curing equipment.

[0007] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution: In a first aspect, the present invention provides a multi-layer graded carbon mineralization curing device, comprising: The housing has a closed reaction chamber inside, which is divided vertically into at least three functional areas distributed sequentially along the height direction; A conveying mechanism, disposed inside the reaction chamber, is used to carry the product to be mineralized and drive it sequentially through the at least three functional areas along a preset path; and An atmosphere control system, which is connected to the reaction chamber, is used to supply carbon dioxide gas into the reaction chamber and regulate the environmental parameters inside the chamber; The atmosphere control system is configured to create differentiated carbon dioxide concentration, temperature, and / or humidity environments in the at least three functional areas, so that the mineralized product undergoes a phased carbon mineralization reaction during movement.

[0008] In some embodiments, the at least three functional areas include, from bottom to top: The first carbon mineralization reaction zone, located in the lower part of the reaction chamber, is configured to have a first atmosphere environment; A second carbon mineralization reaction zone, located above the first carbon mineralization reaction zone, is configured to have a second atmosphere environment; and The aging and maintenance area, located above the second carbon mineralization reaction area, is configured to have a third atmosphere environment; The carbon dioxide concentrations in the first, second, and third atmospheric environments decrease sequentially, and the temperature of the third atmospheric environment is higher than that of the first and / or second atmospheric environments.

[0009] In some embodiments, the conveying mechanism includes: A drive chain, which is arranged vertically inside the reaction chamber; and Multiple clamping components are disposed on the drive chain and configured to clamp the product to be mineralized, and pass through the at least three functional areas sequentially from bottom to top under the drive of the drive chain.

[0010] In some embodiments, a magnetic adsorption interface is provided on one side of the clamping assembly; a rotary drive assembly is provided in the functional area in the middle, and an electromagnetic adsorption unit is provided on the rotary drive assembly. The electromagnetic adsorption unit is configured to adsorb the magnetic adsorption interface so that the clamping assembly is separated from the transmission chain and is connected to the rotary drive assembly for transmission.

[0011] In some embodiments, the atmosphere conditioning system includes: An intake fan, connected via piping to the functional area located at the bottom, is used to input carbon dioxide gas; An exhaust fan, connected via piping to the functional area located at the top, is used to extract exhaust gas; A dehumidification unit is installed on the exhaust path of the exhaust fan to condense and remove water from the extracted exhaust gas; The exhaust path is connected to the intake end of the intake fan, so that the gas processed by the dehumidification unit can flow back to the intake end of the intake fan directly or after being mixed with fresh carbon dioxide, forming a closed-loop gas circulation.

[0012] In some embodiments, a partition is provided between any two adjacent functional areas, and each partition is provided with an airflow channel to enable gas communication between the functional areas and form a bottom-up gas flow trend.

[0013] In some embodiments, the multi-level graded carbon mineralization curing equipment further includes a waste heat recovery component, wherein the heat medium inlet of the waste heat recovery component is connected to the reaction chamber, and its heat medium outlet is connected to the upper and / or lower functional areas.

[0014] In some embodiments, the environmental parameters of the first atmosphere are configured as follows: carbon dioxide concentration ≥90%, temperature 50°C to 70°C, and relative humidity 60% to 80%; the environmental parameters of the second atmosphere are configured as follows: carbon dioxide concentration 50% to 70%, temperature 20°C to 30°C, and relative humidity 50% to 70%; and the environmental parameters of the third atmosphere are configured as follows: carbon dioxide concentration 20% to 40%, temperature 90°C to 110°C, and relative humidity 40% to 60%.

[0015] Secondly, the present invention also provides a multi-level graded carbon mineralization curing method, applied to the multi-level graded carbon mineralization curing equipment as described in the first aspect, comprising the following steps: S1. The product to be mineralized is sent into the first carbon mineralization reaction zone for preliminary rapid mineralization. S2. The product to be mineralized is transported to the second carbon mineralization reaction zone, and the product to be mineralized is controlled to rotate to achieve uniform carbon mineralization. S3. Transport the products to be mineralized to the aging and curing area for aging and curing. S4, Product discharge; The carbon dioxide concentration in the first carbon mineralization reaction zone, the second carbon mineralization reaction zone, and the aging and curing zone decreases sequentially, and the ambient temperature of the aging and curing zone is higher than that of the first carbon mineralization reaction zone and / or the second carbon mineralization reaction zone.

[0016] In some embodiments, step S2, controlling the rotational movement of the product to be mineralized, includes: The clamping assembly carrying the product to be mineralized is attached and fixed by an electromagnetic adsorption unit, and then lifted from the conveying mechanism to a suspended state. Drive the clamping assembly to rotate, causing the product to be mineralized to be flipped at multiple angles in the airflow for a specified time; Disconnect the power supply to the electromagnetic adsorption unit and return the clamping assembly to the conveying mechanism.

[0017] Compared with the prior art, the present invention provides a multi-level graded carbon mineralization curing equipment and method, which divides the interior of the chamber into at least three functional areas along the height direction, uses an atmosphere conditioning system to provide carbon dioxide gas to the reaction chamber, and adjusts the environmental parameters of each functional area to form a differentiated carbon dioxide concentration, temperature and / or humidity environment. At the same time, the product to be mineralized is driven by a conveying mechanism to pass through each functional area sequentially along a preset path, so that the product to be mineralized undergoes a staged carbon mineralization reaction during the movement.

[0018] In this way, by constructing a graded atmosphere environment within the same chamber, different height areas correspond to different carbon mineralization stages such as rapid carbon mineralization, transition, and post-curing. This enables precise segmented control of the carbon mineralization process from a spatial perspective, avoids an overly uniform atmosphere environment, ensures the efficiency of the carbon mineralization reaction, improves space utilization, facilitates efficient and continuous curing of large or batch products, and enhances the controllability of product performance. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of a multi-level graded carbon mineralization curing device in one embodiment of the present invention; Figure 2 This is a top view of the partition in one embodiment of the present invention; Figure 3 This is a top view of the sample clamping plate in one embodiment of the present invention; Figure 4 This is a schematic diagram of the partition and conveying structure in one embodiment of the present invention; Figure 5 This is a schematic diagram of the structure of the sample clamping plate and the drive shaft in one embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of a rotary drive assembly in one embodiment of the present invention; Figure 7 This is a schematic diagram of the atmosphere conditioning system in one embodiment of the present invention; Figure 8 This is a schematic flowchart of a multi-level graded carbon mineralization maintenance method in one embodiment of the present invention; Figure 9a This is a schematic diagram showing the carbon fixation test results of the board material prepared in Example 1; Figure 9b This is a schematic diagram showing the carbon fixation test results of the board prepared in Comparative Example 1. Figure 9c This is a schematic diagram showing the carbon fixation test results of the board prepared in Comparative Example 2. Figure 9dThis is a schematic diagram showing the carbon fixation test results of the board prepared in Comparative Example 3.

[0020] Explanation of reference numerals in the attached drawings: 1. Box body; 11. Reaction chamber; 111. First carbon mineralization reaction zone; 112. Second carbon mineralization reaction zone; 113. Aging and curing zone; 2. Conveying mechanism; 21. Chain mechanism; 211. Drive chain; 212. Support plate; 22. Sample clamping plate; 221. Magnetic adsorption interface; 3. Atmosphere conditioning system; 31. Inlet fan; 32. Exhaust fan; 33. Dehumidification unit; 34. Waste heat recovery component; 4. Partition; 41. Conveying channel; 42. Air hole; 5. Feeding mechanism; 6. Discharging mechanism; 7. Rotary drive component; 71. Drive shaft; 72. Electromagnetic adsorption unit; 73. Electrical signal controller; 8. Partition controller; 9. Temperature and humidity monitor. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0022] To address the aforementioned technical problems, this invention provides a multi-level graded carbon mineralization curing equipment and method, which enables precise segmented control of the carbon mineralization process from a spatial perspective, avoids an overly uniform atmosphere environment, ensures the efficiency of the carbon mineralization reaction, improves space utilization, facilitates efficient and continuous curing of large or batch products, and enhances the controllability of product performance.

[0023] Please see Figure 1 , Figure 1 This is a schematic diagram of the overall structure of a multi-level graded carbon mineralization curing device according to an embodiment of the present invention. The multi-level graded carbon mineralization curing device includes a housing 1, a conveying mechanism 2, and an atmosphere conditioning system 3. The housing 1 has a reaction chamber 11 inside; the conveying mechanism 2 is located on one side of the housing 1 and can extend into the interior of the reaction chamber 11; and the atmosphere conditioning system 3 is connected to the reaction chamber 11.

[0024] In practical applications, the conveying mechanism 2 can be used to carry the product to be mineralized and transport it into the reaction chamber 11; the atmosphere conditioning system 3 can be used to supply carbon dioxide gas into the reaction chamber 11 and to regulate the environmental parameters inside the reaction chamber 11 (such as carbon dioxide concentration, temperature, and humidity). Thus, by controlling the environmental parameters inside the reaction chamber 11, the product to be mineralized can complete the carbon mineralization reaction within the reaction chamber 11.

[0025] The aforementioned housing 1 can adopt a sealed steel structure frame to ensure the airtightness of the internal reaction chamber 11. At the same time, multiple partitions 4 can be installed inside the reaction chamber 11. The partitions 4 are parallel to each other and can be arranged vertically at intervals, thereby dividing the internal space of the reaction chamber 11 into at least three functional areas along the height direction.

[0026] In one embodiment, please refer to Figure 1 The aforementioned partition 4 can be set to two, and the two partitions 4 can divide the reaction chamber 11 into three functional areas along the height direction. The three functional areas from bottom to top can be the first carbon mineralization reaction area 111, the second carbon mineralization reaction area 112, and the aging and maintenance area 113.

[0027] like Figure 2 As shown, taking one of the partitions 4 as an example, the partition 4 is provided with an airflow channel. The airflow channel includes a conveying channel 41 located in the middle of the partition 4 and a plurality of air holes 42 distributed around the conveying channel 41. The conveying channel 41 and each air hole 42 are connected to the upper and lower functional areas.

[0028] Based on this, the aforementioned conveying mechanism 2 is located inside the reaction chamber 11 and inside the conveying channel 41. It can drive the product to be mineralized to pass through the conveying channel 41 on the two partitions 4 in sequence, so that the product to be mineralized can pass through the three functional areas mentioned above in sequence.

[0029] At the same time, the atmosphere conditioning system 3 can adjust the environmental parameters of the three functional areas respectively, so that the first carbon mineralization reaction zone 111 has a first atmosphere environment, the second carbon mineralization reaction zone 112 has a second atmosphere environment, and the aging and maintenance zone 113 has a third atmosphere environment.

[0030] Thus, as the product to be mineralized passes through the first carbon mineralization reaction zone 111, the second carbon mineralization reaction zone 112, and the aging and curing zone 113 in sequence with the conveying mechanism 2, the product to be mineralized can undergo different stages of carbon mineralization reaction in sequence during the movement.

[0031] The first carbon mineralization reaction zone 111 corresponds to the rapid carbon mineralization stage of the product, the second carbon mineralization reaction zone 112 corresponds to the transition stage of the product, and the aging and curing zone 113 corresponds to the curing stage of the product. After the curing stage is completed in the aging and curing zone 113, the mineralized product can be formed into the desired finished product.

[0032] In one embodiment, please refer to Figure 1 The box body 1 has an inlet and an outlet on two opposite side walls, which are located on the upper and lower sides of the box body 1, respectively. The inlet is connected to the first carbon mineralization reaction zone 111, and the outlet is connected to the aging and curing zone 113.

[0033] Correspondingly, the equipment also includes a feeding mechanism 5 and a discharging mechanism 6, which are respectively located at the inlet and outlet and can be used for feeding and discharging materials respectively.

[0034] Specifically, the feeding mechanism 5 can be a first belt conveyor. The first belt conveyor can be horizontally arranged on the side of the feed port on the box 1, and can be horizontally extended to the interior of the first carbon mineralization reaction zone 111 through the feed port. It can be used to continuously or intermittently feed the product to be mineralized (such as a fiberboard blank that has not yet been carbon mineralized) into the bottom of the first carbon mineralization reaction zone 111.

[0035] Similarly, the above-mentioned discharge mechanism 6 can be a second belt conveyor device. The second belt conveyor device can be horizontally arranged on the side of the discharge port on the box 1, and can be horizontally extended to the interior of the aging and curing area 113 through the discharge port. It can be used to output the finished product that has completed carbon mineralization and curing to the outside of the box 1.

[0036] In one embodiment, please refer to Figure 1 The aforementioned conveying mechanism 2 may include a chain mechanism 21 and multiple clamping components. The multiple clamping components are detachably mounted on the chain mechanism 21 and can be used to clamp and fix the product to be mineralized.

[0037] Specifically, the aforementioned chain mechanism 21 can be provided in two sets, both sets of chain mechanisms 21 are vertically arranged inside the conveying channel 41, and can be arranged in the front-to-back direction (i.e., Figure 1 The belts on the first belt conveyor shown in the diagram (understood in the following text as being spaced out) are arranged at intervals, and the upper and lower sides of the two sets of chain mechanisms 21 can extend to the first belt conveyor and the second belt conveyor respectively.

[0038] Taking one of the chain mechanisms 21 as an example, the chain mechanism 21 may include two transmission chains 211. The two transmission chains 211 may be arranged at intervals along the conveying direction of the first belt conveyor. They may be wound around multiple sprockets and may be driven by a motor.

[0039] Based on this, the aforementioned multiple clamping components can be arranged between the two chain mechanisms 21, with each clamping component spaced apart in the vertical direction, and the opposite sides of each clamping component can be detachably connected to the transmission chains 211 on the two chain mechanisms 21 respectively.

[0040] It should be noted that the size of each clamping component should be smaller than the size of the conveying channel 41, so that each clamping component can move with the chain mechanism 21 and pass through the conveying channel 41. Since each clamping component can clamp and fix one product to be mineralized, the two chain mechanisms 21 can simultaneously drive multiple products to be mineralized to move vertically and pass through the various functional areas in the reaction chamber 11 in sequence.

[0041] In one embodiment, please refer to Figure 3 The aforementioned clamping component can be a sample clamping plate 22, which can be configured as a hollow frame structure and has a clamping structure thereon. The clamping structure can be any existing clamping structure, and there is no specific limitation on it.

[0042] Taking one of the sample clamping plates 22 as an example, between the two chain mechanisms 21, the sample clamping plate 22 can be set horizontally, and its two sides along the width direction of the belt can be connected to the transmission chains 211 on the two chain mechanisms 21 respectively through detachable connectors (not shown in the figure).

[0043] Specifically, such as Figure 4 As shown, to ensure the stability of the sample clamping plate 22, multiple support plates 212 can be spaced apart on the transmission chain 211. The four support plates 212 of equal height on the four transmission chains 211 (two in a group, belonging to two chain mechanisms 21) can jointly support one sample clamping plate 22. At this time, the four corners of the bottom surface of the sample clamping plate 22 can overlap the four support plates 212 respectively, so that the sample clamping plate 22 can remain stable.

[0044] To further improve the stability of the sample clamping plate 22 on the transmission chain 211, the aforementioned detachable connector can be a hook, a fastener, or a magnet. One magnet can be installed at each of the four corners of the sample clamping plate 22, allowing the sample clamping plate 22 to be hooked, fastened, or magnetically attracted to the corresponding support plate 212 via the detachable connector. Taking a magnet as an example, the magnet can be installed at the four corners of the bottom surface of the sample clamping plate 22 and can attract the corresponding support plate 212, thereby improving the stability of the sample clamping plate 22.

[0045] It is understood that the sample clamping plate 22 can be stably set between the two chain mechanisms 21 through the aforementioned detachable connector; based on this, the two chain mechanisms 21 can be controlled to operate synchronously, thereby raising or lowering the sample clamping plate 22 synchronously. During this process, the product to be mineralized can be clamped and fixed on the sample clamping plate 22, so that it can follow the sample clamping plate 22 through each functional area in sequence and complete the carbon mineralization reaction at different stages.

[0046] Meanwhile, by controlling the traction speed of the two chain mechanisms 21, the residence time of the sample to be mineralized in each functional area can be precisely controlled, thereby achieving fine control of carbon mineralization time to meet different process requirements.

[0047] In one embodiment, the second carbon mineralization reaction zone 112 may constitute a transitional stage in the product preparation process. In this case, a rotary drive assembly 7 is provided within the second carbon mineralization reaction zone 112, which can be used to drive the rotational movement of the product to be mineralized.

[0048] For details, please refer to Figure 5 The rotary drive assembly 7 includes a drive shaft 71, which can be horizontally arranged inside the reaction chamber 11. It can be rotatably connected to the inner wall of the housing 1 via a bearing and can be driven by a motor, so that it can rotate flexibly within the second carbon mineralization reaction zone 112.

[0049] Meanwhile, the end of the drive shaft 71 away from the inner wall of the housing 1 can extend horizontally to the middle of the second carbon mineralization reaction zone 112, so that when the sample clamping plate 22 moves with the chain mechanism 21 to the height position of the drive shaft 71, the end of the drive shaft 71 away from the inside of the housing 1 can be connected to the adjacent side wall of the sample clamping plate 22 (i.e. the front or rear side of the sample clamping plate 22).

[0050] Of course, to ensure the stability of the sample clamping plate 22 after being connected to the drive shaft 71, one drive shaft 71 can be installed on the inner wall of the front and rear sides of the housing 1. Two drive shafts 71 can be connected to the inner wall of the corresponding side of the housing 1 through bearings, and one of the drive shafts 71 can drive a motor. At this time, the adjacent ends of the two drive shafts 71 can be connected to the front and rear sides of the sample clamping plate 22 respectively.

[0051] Based on this, please refer to Figure 6 To facilitate the connection between the drive shaft 71 and the sample clamping plate 22, magnetic adsorption interfaces 221 are provided on both the front and rear sides of the sample clamping plate 22. Correspondingly, the rotary drive assembly 7 also includes an electromagnetic adsorption unit 72 and an electrical signal controller 73.

[0052] Taking any one of the drive shafts 71 as an example, the aforementioned electromagnetic adsorption unit 72 can be an electromagnet, which can be fixedly installed at one end of the drive shaft 71 near the sample clamping plate 22, and can magnetically adsorb the magnetic adsorption interface 221 on the adjacent side of the sample clamping plate 22. At the same time, the aforementioned electrical signal controller 73 can be fixedly installed at the end of the drive shaft 71 away from the sample clamping plate 22, and can be electrically connected to the electromagnet and an external control system respectively, so as to facilitate the control of the power supply of the electromagnet.

[0053] In the above manner, when the chain mechanism 21 drives the sample clamping plate 22 to the height position of the drive shaft 71, the electromagnets on the two drive shafts 71 can be energized by the electrical signal controller 73, so that the two drive shafts 71 can respectively attract the magnetic adsorption interface 221 of the sample clamping plate 22 beam through the electromagnets, so as to achieve a stable connection between the drive shaft 71 and the sample clamping plate 22.

[0054] At this time, with the help of the aforementioned detachable connector, the sample clamping plate 22 and the transmission chain 211 can be separated manually or automatically, and the transmission shaft 71 can lift the sample clamping plate 22 from the chain mechanism 21 by electromagnet, so that it is suspended in the air.

[0055] Subsequently, when the motor drives the drive shaft 71 to rotate, the drive shaft 71 can drive the sample clamping plate 22 to rotate, so that the clamped product to be mineralized can be flipped and its orientation continuously changed, so that the front, back and sides of the plate can be exposed to the second atmosphere environment multiple times, thereby significantly improving the uniformity of carbon mineralization.

[0056] In one embodiment, please refer to Figure 1 The atmosphere conditioning system 3 mentioned above may include an intake fan 31 and an exhaust fan 32. The intake fan 31 may be fixedly installed on the lower side of the housing 1 and may be connected to the first carbon mineralization reaction zone 111 inside the reaction chamber 11 through a pipeline. The exhaust fan 32 may be fixedly installed on the upper side of the housing 1 and may be connected to the aging and curing zone 113 inside the housing through a pipeline.

[0057] Thus, the intake fan 31 can blow high-concentration carbon dioxide gas into the first carbon mineralization reaction zone 111 under certain pressure conditions, while the exhaust fan 32 can discharge the reaction exhaust gas in the aging and curing zone 113. When fresh carbon dioxide gas enters the first carbon mineralization reaction zone 111, the gas will flow from bottom to top in the reaction chamber 11 through the airflow channel provided on the partition 4.

[0058] In one embodiment, the atmosphere conditioning system 3 further includes a dehumidification unit 33, which can be a dehumidifier. The dehumidifier can be used to condense water from the high-humidity exhaust gas discharged by the exhaust fan 32. Specifically, the dehumidifier can be installed on the exhaust path (i.e., pipeline) of the exhaust fan 32, and the end of the exhaust path can be connected to the air intake end of the intake fan 31.

[0059] In this way, the dehumidifier can condense water from the high-humidity exhaust gas discharged by the exhaust fan 32; the dehumidified gas can be directly returned to the intake end of the intake fan 31, or mixed with fresh carbon dioxide and returned to the intake end of the intake fan 31, thereby forming a closed-loop gas circulation and making the carbon dioxide gas inside the reaction chamber 11 have a stable and controllable relative humidity.

[0060] In another embodiment, two dehumidifiers can be provided, which can be referred to as the first dehumidifier and the second dehumidifier respectively. The first dehumidifier and the second dehumidifier can be respectively installed on the side wall of the box 1 corresponding to the first carbon mineralization reaction zone 111 and the aging and curing zone 113, and can be used to dehumidify the first carbon mineralization reaction zone 111 and the aging and curing zone 113 respectively.

[0061] Based on this, temperature and humidity monitors 9 can be installed in each functional area to monitor the temperature and humidity in each functional area and to control the operation of the two dehumidifiers in conjunction with the supporting control system.

[0062] Meanwhile, each partition 4 is provided with multiple air holes 42, and each air hole 42 is provided with an air hole 42 switch (not shown in the figure). Each partition 4 is also fixedly provided with a partition controller 8. Taking any partition 4 as an example, the partition controller 8 can be electrically connected to each air hole 42 switch on the corresponding partition 4, and can also be electrically connected to the matching control system to facilitate the opening or closing of each air hole 42 switch.

[0063] Thus, when the vent 42 on any partition 4 is opened, the gas flow between two adjacent functional areas can be increased; especially for the second carbon mineralization reaction zone 112, since it is the transition zone between the first carbon mineralization reaction zone 111 and the aging and maintenance zone 113, the temperature and humidity inside it can be controlled by controlling the gas flow between it and the adjacent functional areas.

[0064] It is understandable that when fresh carbon dioxide gas enters the first carbon mineralization reaction zone 111, the gas flow trend will be formed from bottom to top in the reaction chamber 11 by means of the air flow channel set on the partition 4; on this basis, by controlling the reaction parameters of different functional areas, the carbon dioxide concentration in each functional area from bottom to top can present a gradient distribution that decreases sequentially.

[0065] In one embodiment, please refer to Figure 7 The aforementioned atmosphere control system 3 also includes a waste heat recovery component 34 installed on the housing 1. The waste heat recovery component 34 can be a heat exchanger (such as a plate heat exchanger). The heat exchanger is fixedly installed on the outer wall of the housing 1 and is respectively provided with a hot medium inlet, a hot medium outlet, a cold medium inlet, and a cold medium outlet. The hot medium inlet can be connected to the aging and curing area 113 through a pipeline, the hot medium outlet can be connected to the air inlet end of the aforementioned air intake fan 31 through a pipeline, the cold medium inlet can be connected to an external carbon dioxide supply device through a pipeline, and the cold medium outlet can be connected to the inlet of the aforementioned dehumidifier through a pipeline.

[0066] In the aging and curing zone 113, the gas carrying heat can enter the heat exchanger through the heat medium inlet and exchange heat with carbon dioxide gas from the outside (which enters the heat exchanger through the cold medium inlet), thereby heating this portion of carbon dioxide gas. After the heat exchange is completed, the heated carbon dioxide gas can enter the intake fan 31 through the heat medium outlet and be reintroduced into the first carbon mineralization reaction zone 111. Meanwhile, the gas from the aging and curing zone 113, after releasing heat, can enter the dehumidifier through the cold medium outlet and can flow back to the intake fan 31 after dehumidification is completed.

[0067] It is understandable that the carbon mineralization reaction itself is an exothermic reaction, especially in the first carbon mineralization reaction zone 111. In practical applications, the aging and curing zone 113 can use this heat to cure the products, while excess heat can enter the waste heat recovery component 34, where it exchanges heat with fresh carbon dioxide gas, and the heated carbon dioxide gas is then reintroduced into the first carbon mineralization reaction zone 111 via the intake fan 31. In this way, through waste heat recovery and utilization, energy can be recycled within the equipment, improving overall energy efficiency.

[0068] Of course, in practical applications, the heat medium outlet can be connected to any functional area inside the reaction chamber 11 as needed. For example, the heat medium outlet can also be connected to the aging and curing area 113 through a pipeline to meet the heat demand of the aging and curing area 113. This will not be elaborated further here.

[0069] Please see Figure 8 This invention also provides a multi-level graded carbon mineralization curing method, applicable to the aforementioned carbon mineralization curing equipment, comprising the following steps: S1. The product to be mineralized is sent into the first carbon mineralization reaction zone 111 for preliminary rapid mineralization. S2. The product to be mineralized is transported to the second carbon mineralization reaction zone 112, and the product to be mineralized is controlled to rotate to achieve uniform carbon mineralization. S3. Transport the products to be mineralized to the aging and curing area 113 for aging and curing. S4, Product discharge; The carbon dioxide concentrations in the first carbon mineralization reaction zone 111, the second carbon mineralization reaction zone 112, and the aging and curing zone 113 decrease sequentially, and the ambient temperature of the aging and curing zone 113 is higher than that of the first carbon mineralization reaction zone 111 and / or the second carbon mineralization reaction zone 112.

[0070] Specifically, in step S1, the product to be mineralized can be pretreated first, then clamped and fixed on the sample clamping plate 22, and fed into the first carbon mineralization reaction zone 111 through the feeding mechanism 5 for preliminary rapid mineralization.

[0071] For example, in one embodiment, this curing method can be used to prepare board products, using raw materials including materials rich in calcium silicate mineral phases (such as cement, steel slag and magnesium slag from industrial solid waste, etc.) and fiber raw materials. In this case, the pretreatment can include the following steps: mixing materials rich in calcium silicate mineral phases (such as cement, steel slag and magnesium slag from industrial solid waste, etc.), fiber raw materials, and water in a specified ratio for a specified time to obtain a production slurry; preparing the production slurry into a wet board blank using a sheet-making method; and pressurizing the wet board blank to obtain the board preform. This preform is the product to be mineralized after pretreatment.

[0072] In step S2, the conveying mechanism 2 can send the sample clamping plate 22 carrying the product to be mineralized into the second carbon mineralization reaction zone 112.

[0073] Based on this, the above-mentioned steps of "controlling the rotational movement of the product to be mineralized" include: The clamping assembly carrying the product to be mineralized is fixed by the electromagnetic adsorption unit 72 and lifted from the conveying mechanism 2 to a suspended state. Drive the clamping assembly to rotate, causing the product to be mineralized to be flipped at multiple angles in the airflow for a specified time; Disconnect the power supply to the electromagnetic adsorption unit 72 and return the clamping assembly to the conveying mechanism 2.

[0074] It is understandable that in the second carbon mineralization reaction zone 112, the rotary drive component 7 can be connected to the magnetic adsorption interface 221 on the sample clamping plate 22 by the electromagnetic adsorption unit 72, thereby driving the sample clamping plate 22 to rotate, so that the product to be mineralized can be rotated in the second atmosphere environment, so as to ensure that multiple surfaces on the product to be mineralized can be uniformly contacted with carbon dioxide gas and achieve deep mineralization.

[0075] After the sample to be mineralized product is rotated for a specified period of time, the sample clamping plate 22 is in a horizontal state. At this time, the electromagnetic adsorption unit 72 can be de-energized and demagnetized by the electrical signal controller 73, so that the electromagnetic adsorption unit 72 is disconnected from the sample clamping plate 22, thereby placing the sample clamping plate 22 back onto the carrier plate 212 on the transmission chain 211. The sample clamping plate 22 can be reconnected to the carrier plate 212 through the aforementioned detachable connector, so that it can continue to move stably with the transmission chain 211.

[0076] After completing the above steps, the conveying mechanism 2 can send the sample clamping plate 22 into the aging and curing area 113, and carry out aging and curing in this functional area until the product is formed.

[0077] It should be noted that in this embodiment, during the process of the conveying mechanism 2 driving the sample clamping plate 22 to pass through the above three functional areas in sequence, the environmental parameters of the first atmosphere environment, the second atmosphere environment and the third atmosphere environment can be flexibly configured through the atmosphere conditioning system 3, so that the product to be mineralized can achieve different stages such as rapid carbon mineralization, transition and post-curing in the environment, thereby realizing fine segmented control of the carbon mineralization process from the spatial dimension.

[0078] In practical applications, the environmental parameters of the first atmosphere can be configured as follows: carbon dioxide concentration ≥90%, temperature 50℃ to 70℃, and relative humidity 60% to 80%; the environmental parameters of the second atmosphere can be configured as follows: carbon dioxide concentration 50% to 70%, temperature 20℃ to 30℃, and relative humidity 50% to 70%; and the environmental parameters of the third atmosphere can be configured as follows: carbon dioxide concentration 20% to 40%, temperature 90℃ to 110℃, and relative humidity 40% to 60%.

[0079] Based on this, the environmental parameters of the first atmosphere environment, the second atmosphere environment, and the third atmosphere environment can be controlled separately according to the process requirements of different products.

[0080] Taking the preparation of sheet products using this method as an example, the present invention provides Example 1 and three comparative examples (Comparative Examples 1-3) to verify the performance advantages of the sheet products prepared by this method.

[0081] To avoid redundancy, the fibers used in Example 1 and the three comparative examples (Comparative Examples 1-3) are all pulp fibers with an average length of 2-4 mm and accounting for 10% of the solid raw material mass; the material rich in calcium silicate mineral phase is preferably a mixture of steel slag and magnesium slag with an average particle size ≤50 μm and accounting for 90% of the solid raw material mass. In this case, the forming (i.e., pretreatment) of the board blank includes the following steps: The mixed powder raw materials of steel slag and magnesium slag, pulp fiber and water are mixed at a mass ratio of 1:20 for 15 minutes to obtain the production pulp. The production slurry is prepared into wet board blanks using the paper-making method; The wet blank of the board is pressurized under the following conditions: grouting pressure of 20MPa and holding pressure for 2 minutes to obtain the above-mentioned board blank.

[0082] Example 1: The embryo is manually loaded into the sample clamping plate 22, and then the sample clamping plate 22 is fed into the reaction chamber 11 through the feeding mechanism 5. Then, CO2 gas with a concentration of 99% is introduced into the first carbon mineralization reaction zone 111 from the air intake fan 31. The temperature of the first atmosphere is adjusted to 60°C and the humidity to 75% by the atmosphere conditioning system 3, and the embryo is cured in this environment for 0.5 hours.

[0083] After the curing of the first carbon mineralization reaction zone 111 is completed, the sample clamping plate 22 is lifted to the second carbon mineralization reaction zone 112 by the conveying mechanism 2. The sample clamping plate 22 (on which the embryo is supported) is then lifted to a suspended state by an electromagnet, and then driven to rotate at a speed of 5 r / min. At this time, the pores 42 on the partition 4 are opened, allowing CO2 to diffuse from the first carbon mineralization reaction zone 111 to the second carbon mineralization reaction zone 112, so that the CO2 concentration in the second atmosphere is maintained at 60%, the temperature at 25℃, and the humidity at 60%, and the embryo is cured in this environment for 2 hours.

[0084] After the curing process in the second carbon mineralization reaction zone 112 is completed, the sample clamping plate 22 is returned to the conveying mechanism 2 using an electromagnet, and then the conveying mechanism 2 sends the sample clamping plate 22 into the upper aging and curing zone 113. At this time, the CO2 concentration, temperature, and humidity of the third atmosphere are adjusted to 30%, 105℃, and 70% using the atmosphere conditioning system 3, for a duration of 24 hours. After the aging and curing process is completed, the slab is formed, and the finished slab can be discharged along the discharge mechanism 6.

[0085] Comparative Example 1: The process flow of this comparative example is basically the same as that of Example 1, except for the environmental parameters of the first atmosphere. Specifically, in Comparative Example 1, the environmental parameters of the first atmosphere are: CO2 concentration of 99%, temperature of 60°C, humidity of 75%, and curing time of 0.5h.

[0086] Comparative Example 2: The process flow of this comparative example is basically the same as that of Example 1, except for the environmental parameters of the third atmosphere. Specifically, in Comparative Example 3, the environmental parameters of the third atmosphere are: CO2 concentration of 30%, temperature of 25°C, humidity of 70%, and curing time of 24 hours.

[0087] Comparative Example 3: Compared to Example 1, in Comparative Example 3, after the preform has completed curing in the first carbon mineralization reaction zone 111, it is directly sent to the aging and curing zone 113 via the conveying mechanism 2, thus eliminating the curing step in the second carbon mineralization reaction zone 112. Furthermore, the environmental parameters of the first and third atmospheres in Comparative Example 3 are the same as in Example 1, and will not be repeated here.

[0088] Multiple board products can be prepared using the above Example 1 and three comparative examples. The flexural strength, water absorption, and porosity of each board product are tested as follows: Table 1: Comparison of sheet material properties between Example 1 and Comparative Examples 1-3

[0089] Continued from Table 1:

[0090] Simultaneously, carbon fixation content testing can be performed on each board. Specific steps include: taking samples every 20cm from the edge to the center of the board, and then testing the carbon fixation content to characterize the uniformity of carbonization. Sampling can be done using core drilling. After obtaining 5g of sample, it is calcined at 450℃ until all moisture is removed and components such as calcium hydroxide are completely decomposed. The mass is then measured, and the sample is calcined again at 950℃ until equilibrium is reached. The mass loss between 450℃ and 950℃ is calculated. Combined with the initial sample mass, the carbon fixation content of the sample can be calculated. Based on this, by comparing the carbon fixation content of the sample at the edge and the sample at the center, the uniformity of carbonization at the edge and center of the board can be obtained. The results are as follows: Figure 9a , 9b As shown in 9c and 9d.

[0091] Based on Table 1, and in conjunction with Figure 9a , 9b From 9c and 9d, we can see that: in Comparative Example 1, the initial reaction temperature was too low, the reaction kinetic rate was slow, and the surface carbonization layer was not fully formed, which directly affected the subsequent deep reaction and led to a decrease in the overall strength and durability of the product; in Comparative Example 2, due to the lack of a high-temperature aging process, the growth of carbonate crystals inside the product was incomplete, the microstructure was loose and porous, and the strength and water resistance were greatly reduced; in Comparative Example 3, due to the lack of a rotation and flipping step, the leeward and contact surfaces of the product were not sufficiently mineralized, and the uniformity was uneven, which directly affected its overall mechanical properties.

[0092] In contrast, the difference between the maximum carbon fixation at the edge and the carbon fixation at the center of the board prepared in Example 1 is approximately 23%, which represents an improvement of over 10% in carbonization uniformity compared to the board prepared in Comparative Example 3. Furthermore, the board prepared in Example 1 exhibits significantly better performance indicators such as saturated bending strength, water absorption, and porosity than boards prepared using other curing methods.

[0093] By comparing the data from Example 1 and the three sets of comparative examples, the following conclusions can be drawn: First, the temperature gradient setting is crucial to the performance of the product, especially the high-temperature aging process, which directly determines the microstructure and mechanical strength of the product; Second, rotation curing is an important step in improving the uniformity of mineralization, which can effectively solve the industry pain point of uneven mineralization in thick plate products; Third, the waste heat recovery system can significantly reduce energy consumption and achieve green and low-carbon production.

[0094] Based on this, the embodiments of the present invention can achieve at least the following beneficial effects: By constructing a graded atmosphere environment within the same chamber, different height areas correspond to different stages such as rapid carbon mineralization, transition, and post-curing, achieving precise segmented control of the carbon mineralization process from a spatial dimension, thus improving the efficiency of the carbon mineralization reaction and the controllability of product performance; simultaneously, by setting up a rotating carbon mineralization structure, multiple surfaces of the product can undergo uniform carbon mineralization, improving the uniformity of multi-faceted carbon mineralization for thick plates, large components, or irregular products; furthermore, by setting up a waste heat recovery component 34 in the aging and curing area and recovering and utilizing waste heat, the heat energy can be circulated within the equipment while ensuring a suitable reaction temperature, reducing overall energy consumption and achieving good energy saving and emission reduction effects; in addition, the embodiments of the present invention can balance mechanical reliability and process flexibility, and can adjust the layered atmosphere conditions, rotation speed, and number of track layers according to different product specifications and performance requirements, making it widely applicable and highly valuable for engineering promotion.

[0095] The specific embodiments of the present invention described above do not constitute a limitation on the scope of protection of the present invention. Any other corresponding changes and modifications made in accordance with the technical concept of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A multi-level graded carbon mineralization curing device, characterized in that, include: The housing has a closed reaction chamber inside, which is divided vertically into at least three functional areas distributed sequentially along the height direction; A conveying mechanism, which is disposed inside the reaction chamber, is used to carry the product to be mineralized and drive it to pass through the at least three functional areas sequentially along a preset path; as well as An atmosphere control system, which is connected to the reaction chamber, is used to supply carbon dioxide gas into the reaction chamber and regulate the environmental parameters inside the chamber; The atmosphere control system is configured to create differentiated carbon dioxide concentration, temperature, and / or humidity environments in the at least three functional areas, so that the mineralized product undergoes a phased carbon mineralization reaction during movement.

2. The multi-layer graded carbon mineralization curing equipment according to claim 1, characterized in that, The at least three functional areas, from bottom to top, include: The first carbon mineralization reaction zone, located in the lower part of the reaction chamber, is configured to have a first atmosphere environment; A second carbon mineralization reaction zone, located above the first carbon mineralization reaction zone, is configured to have a second atmosphere environment; and The aging and maintenance area, located above the second carbon mineralization reaction area, is configured to have a third atmosphere environment; The carbon dioxide concentrations in the first, second, and third atmospheric environments decrease sequentially, and the temperature of the third atmospheric environment is higher than that of the first and / or second atmospheric environments.

3. The multi-layer graded carbon mineralization curing equipment according to claim 1, characterized in that, The conveying mechanism includes: A drive chain, which is arranged vertically inside the reaction chamber; and Multiple clamping components are disposed on the drive chain and configured to clamp the product to be mineralized, and pass through the at least three functional areas sequentially from bottom to top under the drive of the drive chain.

4. The multi-layer graded carbon mineralization curing equipment according to claim 3, characterized in that, A magnetic adsorption interface is provided on one side of the clamping component; A rotary drive assembly is provided in the central functional area. An electromagnetic adsorption unit is provided on the rotary drive assembly. The electromagnetic adsorption unit is configured to adsorb the magnetic adsorption interface so that the clamping assembly is separated from the transmission chain and is connected to the rotary drive assembly for transmission.

5. The multi-layer graded carbon mineralization curing equipment according to claim 1, characterized in that, The atmosphere conditioning system includes: An intake fan, connected via piping to the functional area located at the bottom, is used to input carbon dioxide gas; An exhaust fan, connected via piping to the functional area located at the top, is used to extract exhaust gas; A dehumidification unit is installed on the exhaust path of the exhaust fan to condense and remove water from the extracted exhaust gas; The exhaust path is connected to the intake end of the intake fan, so that the gas processed by the dehumidification unit can flow back to the intake end of the intake fan directly or after being mixed with fresh carbon dioxide, forming a closed-loop gas circulation.

6. The multi-layer graded carbon mineralization curing equipment according to claim 5, characterized in that, A partition is provided between any two adjacent functional areas, and each partition is provided with an airflow channel to enable gas communication between the functional areas and form a bottom-up gas flow trend.

7. The multi-layer graded carbon mineralization curing equipment according to claim 1, characterized in that, It also includes a waste heat recovery component, wherein the heat medium inlet of the waste heat recovery component is connected to the reaction chamber, and its heat medium outlet is connected to the upper and / or lower functional areas.

8. The multi-layer graded carbon mineralization curing equipment according to claim 2, characterized in that, The environmental parameters of the first atmosphere are configured as follows: carbon dioxide concentration ≥90%, temperature 50°C to 70°C, and relative humidity 60% to 80%. The environmental parameters of the second atmosphere are configured as follows: carbon dioxide concentration of 50% to 70%, temperature of 20°C to 30°C, and relative humidity of 50% to 70%. The environmental parameters of the third atmosphere are configured as follows: carbon dioxide concentration of 20% to 40%, temperature of 90°C to 110°C, and relative humidity of 40% to 60%.

9. A multi-level graded carbon mineralization curing method, characterized in that, The multi-level graded carbon mineralization curing equipment as described in any one of claims 1-8 comprises the following steps: S1. The product to be mineralized is sent into the first carbon mineralization reaction zone for preliminary rapid mineralization. S2. The product to be mineralized is transported to the second carbon mineralization reaction zone, and the product to be mineralized is controlled to rotate to achieve uniform carbon mineralization. S3. Transport the products to be mineralized to the aging and curing area for aging and curing. S4, Product discharge; The carbon dioxide concentration in the first carbon mineralization reaction zone, the second carbon mineralization reaction zone, and the aging and curing zone decreases sequentially, and the ambient temperature of the aging and curing zone is higher than that of the first carbon mineralization reaction zone and / or the second carbon mineralization reaction zone.

10. The multi-level graded carbon mineralization maintenance method according to claim 9, characterized in that, In step S2, controlling the rotational movement of the product to be mineralized includes: The clamping assembly carrying the product to be mineralized is attached and fixed by an electromagnetic adsorption unit, and then lifted from the conveying mechanism to a suspended state. Drive the clamping assembly to rotate, causing the product to be mineralized to be flipped at multiple angles in the airflow for a specified time; Disconnect the power supply to the electromagnetic adsorption unit and return the clamping assembly to the conveying mechanism.

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